05.1 - Graduação (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2909
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44 resultados
Resultados da Pesquisa
Item Aplicação de nanomateriais advindos de biomassa para tratamento de águas residuárias da indústria têxtil(2019-01-25) Nascimento, Rizia Keila do; Araújo, Ana Cláudia Vaz de; http://lattes.cnpq.br/6861890992609511; http://lattes.cnpq.br/8972131109377770The inadequate disposal of industrial effluents has caused serious problems of environmental contamination worldwide. In the textile pole of Pernambuco some cases of river pollution were reported due to the process of dyeing and washing of fabrics. In this work, the feasibility of the use of nanostructured carbonaceous materials (CN) in the adsorption of textile dyes is studied. To obtain the carbonaceous material sugarcane leaves were used, these were washed, dried, crushed and submitted to hydrothermal synthesis. The samples were characterized by X-ray diffractometry (XRD), infrared (IR) spectroscopy, thermogravimetric analysis (TGA) and porosimetric analysis. The synthesized materials were presented as finely divided dark powders. In adsorption analyzes of the indigo carmine and red congo dyes the nanomaterials showed to be promising adsorbents. It was possible to observe a favorable behavior in relation to the adsorption of the dyes in liquid medium. The Langmuir, Freundlich and Redlich- Peterson isotherm models were suitable for the studied materials. The kinetic adsorption analysis suggests a pseudo second order behavior. The adsorptive mechanism of the nanomaterials could be characterized as heterogeneous, with adsorbate / adsorbent interactions of a chemical nature, where adsorption in monolayers is carried out at low concentrations and in multilayers at high concentrations of dye.Item Estudo do comportamento mecânico de estruturas submetidas a corregamento estático(2019-01-31) Araujo, Joice Ferreira Nunes de; Silva, Jordlly Reydson de Barros; http://lattes.cnpq.br/4382584044561547; http://lattes.cnpq.br/6554335127800409During the structural design, it is essential to know the mechanical behavior of structural elements once it enables to understand the deformation and the internal forces acting in the system. However, until the mid-twentieth century, for certain types of structures, performing this analysis accurately was a challenging task because of the difficulty and quantity of calculations involved. This scenario began to change with the advent of the computer, which allowed the application of mathematical techniques, such as the Finite Element Method, to structural analysis, providing greater precision in the evaluations. Thus, based on the importance of these for civil construction, this work had as objective to provide the interpretation of the mechanical behavior of a deep beam subjected to static loads. For this, the software ABAQUS/CAE, student version 2018, was used to simulate the chosen example, detailing each step of the simulation process and how each of these can influence the results. Therefore, the computational simulation of the deep beam allowed to analyze the stress distribution along the element.Item Caracterização físico-química e avaliação da qualidade das águas subterrâneas em poços da comunidade de Itapuama, Cabo de Santo Agostinho/PE(2019-12-11) Duarte, Wiliane Roberta da Silva; Silva, Robson José; http://lattes.cnpq.br/7515677435963888The use of wells to obtain underground water resources has become a complementary alternative for human supply. However, over the years, high consumption and anthropic action have contributed to the scarcity of groundwater and its contamination, have contributed to the contamination of groundwater, making it an agent that transmits diseases caused by pathogenic microorganisms from percolation of domestic sewage and/or chemical matter in concentrations that exceed the standards authorized by the Ministry of Health and CONAMA 357/2005, of the Ministry of the Environment. The aim of this study was to analyze the physical-chemical parameters: pH, dissolved oxygen, electrical conductivity, total dissolved solids, salinity, color and turbidity and to evaluate water quality by the Most Likely Number (NMP.100 mL-1) of total coliforms and thermotolerant, based on current legislations. In −1 total, 120 samples were analyzed for physical-chemical characterization and 6 for microbiological, from three wells in the community of Itapuama, located in the city of Cabo de Santo Agostinho - PE. Of the evaluated wells, two did not comply with the quality standard established by Brazilian legislation. The results showed a high concentration of electrical conductivity, low dissolved oxygen and high levels of microbial contamination. These non-conformities can originate from the inefficiency of the neighborhood's sewage system. The third well, since it is a phreatic tubular well, presented good quality water in the studied parameters, being above the limit only in the electrical conductivity parameter.Item Projeto estrutural de vigas-parede biapoiadas de concreto armado(2019-07-09) Couto, André Vinícius Melo; Silva, Jordlly Reydson de Barros; http://lattes.cnpq.br/4382584044561547; http://lattes.cnpq.br/4544033112109443The purpose of this work is to present the main fundamentals of single-span deep beams structural design, and analyze these elements through the Finite Element Method (FEM), using ABAQUS/CAE software, student version. During the study, a design procedure is discussed, which is implemented in the Smath Studio software. A discussion is also made about the FEM modeling procedure, such as the deep beam information implementation, such as material, supports and applied loads. Thus, for a problem present in the literature, the support tensions, provided by the software are compared, verifying the proximity of the answers obtained. Finally, a parameter study of the problem is made, through the Smath Studio routine, observing the influence of geometric parameters and loads on the behavior of the structure.Item Impactos da inserção de geração distribuída no desempenho de funções de proteção de sistemas elétricos(2019-07-17) Guerra, Keylla Rayanne Albuquerque; Reis, Raphael Leite de Andrade; http://lattes.cnpq.br/1139577841043865; http://lattes.cnpq.br/8938549432716009From the need to expand the electric generation due to population and industrial growth, the connection of Distributed Generation (DG) with the electrical system has increased due to its several advantages, such as: minimization of transmission losses over long distances, location near consumer centers, minimizing environmental impacts and greater reliability. Despite being a trend, challenges to the protection system are imposed as contributions to short circuit currents may become more evident with the GD connection. In order to investigate the impact of GD on electrical power system protection functions, fault simulations were performed in the Alternative Transients Program (ATP) software, considering a 230 kV network reported in the literature. Short circuits were simulated along the evaluated power system as well as near the distance protection zone reaching, taking into account different types of disturbances. From the obtained results, the insertion of GD can affect the voltage and current signals measured by the protective device, as well as protection functions, leading them to misoperate if revisions on their adjustment settings are not performed.Item Análise do processo adsortivo de corantes industriais por nanopartículas magnéticas de magnetita (Fe3O4)(2019-07-08) Cabral, Ariane Nathália de Siqueira Souza; Araújo, Ana Cláudia Vaz de; http://lattes.cnpq.br/6861890992609511; http://lattes.cnpq.br/3246406733304902Environmental degradation is an inevitable factor that accompanies the development of the population and unfortunately this has reached water systems, rivers and water sources. Among the agents that contribute to the contamination and degradation are the dyes from the textile and food industries that are discarded throughout the production processes. There are several methods being developed to eliminate the effluent dyes in rivers and springs, among which is the adsorption process. The magnetic nanoparticles of magnetite (Fe3O4) have been previously tested in the adsorption of dye residues from the textile and food industries. In this context, the objective of this work was to study the efficiency of magnetic nanoparticles of magnetite (NPs) in the adsorption process of some dyes present in industrial textile effluents, such as dyes, methyl orange (MEL) and methylene blue (AM) . A factorial design 2³ was established obtaining as factors studied time, pH and temperature, and for these factors its levels were analyzed. Analyzes were made for systems under ultrasound and under magnetic stirring, and for this, significant results were obtained for the two dyes. According to the results obtained for the ALM / NPs, factors such as time and pH with greater significance. It was observed that the most successful tests for adsorption were the tests 02 (11,362) and 06 (10,057), for the systems under ultrasound and under magnetic stirring, respectively. For the AM / NPs it was significant only the factor, time. The most favorable tests for the dye adsorption system were 04 (19,144) and 06 (21,457), for systems under ultrasound and under magnetic stirring, respectively.Item Projeto de reuso de água pluvial em habitação popular para fins não potáveis(2019-12-12) Cruz, Ana Vitória de Souza; Silva, Robson José; http://lattes.cnpq.br/7515677435963888; http://lattes.cnpq.br/1049768443014317Strong population growth and urbanization have led to increased drinking water consumption. This factor, coupled with irresponsible use and pollution of water sources, has contributed to a considerable water crisis. Brazil is a privileged country, as it has 12% of the world's freshwater, but due to poor distribution, there are regions of the country where water availability is low, such as the Northeast of Brazil that faces severe scarcity crises most of the year. Therefore, the search for sustainable policies that provide solutions to this problem and at the same time make the population aware of the importance of conscious use of water is necessary. Within this context, the reuse of rainwater becomes a viable alternative, easily applied, which provides the preservation of the environment. Therefore, the present work elaborated a popular housing project in Recife based on the city's Master Plan and designed a Rainwater harvesting System for this dwelling, according to NBR 10844 (1989). In the project, the rainwater was captured only by water from the roof, which enough to meet the house reuse needs, as the city has a high rate of rainfall. The materials used in the installation of the collection system were low cost and simple to apply, where the implementation project presented a much lower cost than the total value of residential construction, besides representing an excellent alternative for environmental awareness and treated water savingItem Estudo da vulnerabilidade ambiental da barragem de Tapacurá pelo aporte natural do solo, Zona da Mata norte de Pernambuco, Brasil(2019-07-10) Lima, Nívea Ramos de; Moraes, Alex Souza; http://lattes.cnpq.br/0440163845324480; http://lattes.cnpq.br/5045118226452812Aprocess of use and occupation of the soils of hydrographic basins, it generates consequences as the increment of materials for the interior of the dam, thereby it is necessary to establish references about the current stage of contamination regarding the quality of the Sediments inside the Tapacurá Dam, which monitoring will allow a more systemic view of the area, regarding the excess or scarcity of some chemical elements, and serve as a geochemical and environmental study on the quality of the sediments present in this basin, aiming the construction of the EIA / RIME. The sediment samples were collected using a VAN VEEN dredger at predetermined points and destined to the laboratory, where the samples were prepared to follow for chemical analysis of the metals present in the sediments. As a first result, from the depths measured at each point, the map of the bathymetry of the Tapacurá basin was made. The toxicity of soil and sediment samples from the surrounding area of the dam was calculated from bibliographies serving as reference about the contribution of the elements to the basin. Finally, from the Enrichment Factor (EF) that was calculated using the Iron as normalizer element, it indicated that there is enrichment of Cadmium in all collected points distributed inside and outside the basin. However there are similarities between the values, it is not possible to confirm the origin of the change, making it necessary future studies that could recognize the nature of this element.Item Monitoramento físico-químico e ambiental dos solos do Complexo Industrial Portuário de Suape, Região Metropolitana do Recife, Pernambuco, Brasil(2019-05-22) Silva, Rodrigo Atanasio; Moraes, Alex Souza; http://lattes.cnpq.br/0440163845324480; http://lattes.cnpq.br/9853341999557777The present work refers to the study of the physical and chemical characteristics of the soils located in the areas of the Industrial and Port complex of Suape. They were obtained by carrying out a collection in 11 points spread within an area of 450 m², uniformly determined, to have a greater and better representation of the study area. The analyzes made in the laboratory served to determine the granulometry, consistency limits, color and main elements present in the different types of soils. The results obtained show a grouping of two large groups S8, S9, S3, S4, S2, S5 and S7, S11, S10, S6, S1 the first group presents soils with darker colors that are linked with the high amount of clay and the high value of IP. The second group has lighter colors and low amounts of clay, consequently, low IP values.Item Influência da resistência característica (fck) na taxa de armadura em lajes nervuradas de concreto armado sob diferentes configurações de apoio para os concretos do grupo I e II de resistência, segundo a NBR 6118 (ABNT, 2014)(2019-07-12) Amorim Júnior, Laelson de Andrade; Melo, Weslley Imperiano Gomes de; http://lattes.cnpq.br/4789771132461158; http://lattes.cnpq.br/7943300714310248Ribbed slabs are being widely used in civil construction because they allow for large spans with low reinforcement rate, low concrete consumption and lower own weight, compared to massive type slabs, thus allowing execution of slender structures and consequently more economical. In addition to being easy to perform, it can be performed on site or through precast material and in various types of buildings, from homes to large hospitals and malls. Thus, the present work aims to verify influence of (fck) on the reinforcement rate in reinforced concrete ribbed slabs under different support configurations for strength groups I and II concretes, according to NBR 6118 (ABNT, 2014 ), through case study and elaboration of sizing routines based on the current literature. It can be observed that, for proposed case study, the increase of the (fck) had no great influence on reduction of the reinforcement rate, with only a 8.4% decrease in steel section, generating a cost reduction of 34% in its consumption, while the concrete had a significant increase of 190% in her cost. However, such an analysis was made only for ordinary residential buildings with small spans and small loads, so for spans and loading of special works such as bridges, nothing can be afirm.